For while we are occupied with the subtlety and exactness of astronomy and geometry [265] and are forced to apply our minds to difficult problems, and are, in addition, being habituated to speak and apply ourselves to what is said and shown to us, and not to let our wits go wool-gathering, we gain the power, after being exercised and sharpened on these disciplines, of grasping and learning more easily and more quickly those subjects which are of more importance and of greater value.1 [266] I do not, however, think it proper to apply the term “philosophy” to a training which is no help to us in the present either in our speech or in our actions, but rather I would call it a gymnastic of the mind and a preparation for philosophy. It is, to be sure, a study more advanced than that which boys in school pursue, but it is for the most part the same sort of thing;
for they also when they have labored through their lessons in grammar, music,1 and the other branches, are not a whit advanced in their ability to speak and deliberate on affairs, but they have increased their aptitude for mastering greater and more serious studies. [268] I would, therefore, advise young men to spend some time on these disciplines,2 but not to allow their minds to be dried up by these barren subtleties, nor to be stranded on the speculations of the ancient sophists, who maintain, some of them, that the sum of things is made up of infinite elements; Empedocles that it is made up of four, with strife and love operating among them; Ion, of not more than three; Alcmaeon, of only two; Parmenides and Melissus, of one; and Gorgias, of none at all.3 [269] For I think that such curiosities of thought are on a par with jugglers' tricks which, though they do not profit anyone, yet attract great crowds of the empty-minded, and I hold that men who want to do some good in the world must banish utterly from their interests all vain speculations and all activities which have no bearing on our lives.